My building faces another building, and the people in the building next to mine love to yell obscenities when they play computer games at 1-3am in the night. I have repeatedly stepped outside and asked them to lower their voices because, after all, it is 1-3am. Their responses have been minimal. They cannot afford full curtains, so I can see everything they are doing inside their apartment. They leave one of their windows wide open, and they are apparently too cheap to replace the other window as there is no actual window but just a space for one. I can hear everything. When I asked them to quiet down, I know they heard me because they were dead silent and avoided looking out the window at me. I stared them down, and eventually one of them came to the window and told me, "You should move." He then walked away. They resumed gaming and shouting obscenities at their virtual enemies. I do not think going to the police will be effective. When they hear or realize the police have arrived, they will simply quiet down and act like nothing happened. I also cannot get hold of their landlord because I don't know who or where he is. What should I do? I was thinking of buying mice and crickets from the pet store and unleashing them into their rooms through their wide-open windows. I'm in Berkeley, CA if anyone has any personal experience with the police here.